Abstract: A test circuit for testing electrical characteristics of heating elements and switches coupled to individual elements. The switches are manually operated and conventionally may be mounted on a cooking range panel. The switches are operable to place the elements in an energized state wherein they are coupled to an electrical power source and in a deenergized state wherein they are decoupled from such source. The leads from the switches are typically coupled to the leads from the heating elements through a multi-conductor coupling harness wherein one harness segment has a plurality of male connectors and the other harness segment has a plurality of female connectors engageable with the male connectors. A T-connector has a first set of connectors engageable with the male connectors and a second set of connectors engageable with the female connectors and a third set of connectors coupled with the leads of a test circuit.